My York Furnace Fan doesn't turn on when I want fan only feature otherwise works.
My York Furnace Fan doesn't turn on when I set the thermostat to fan only otherwise it works during the heating cycle. When someone sets the thermostat to fan only for me while I am in the basement oserving what happened I hear a click and then a red light flashes briefly on the White Rodgers 50A50-241 ignition Control Module but the fan does not turn on. I have a York Furnace Model P3hu (Upflow/Horizontal) 32-104 Mbh OUTPUT. Doe this module need replacing? Or is it another part?